George is riding a roller coaster that starts at a height of

Last updated: 7/31/2022

George is riding a roller coaster that starts at a height of 46 m and goes down into a valley that is at ground level. He then goes up a second hill that is 32 m height and goes into a second valley that is 14.5m above the ground. What is George's velocity at the bottom of the first valley, top of the second hill and at the bottom of the second valley?